Ditto on what Sparky said. Keep it light! I used an OS 50SX on mine with a Slimline pitts muffler and an APC 12.25-3.75 prop. I also used a Sullivan 8oz. Flextank and built a tray to mount the battery at the rear of the wing saddle, above the servos. I kept the stock metal rod pull pull arrangement on mine. I soldered some wire around the joint where the leading and trailing legs of the landing gear join.

Keep the rubber bands, and tail skid. The extra weight just insn't worth the effort.

The Magic is one of my favorite planes. It's just as comfortable doing whatever violent manuver you can dream up as it is just putting around like a Tiger Moth.